491911115053160 has 256 divisors, whose sum is σ = 1270755659957760. Its totient is φ = 169630517985280.

The previous prime is 491911115053153. The next prime is 491911115053213. The reversal of 491911115053160 is 61350511119194.

It is a super-2 number, since 2×491911115053160² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1071488624 + ... + 1071947616.

It is an arithmetic number, because the mean of its divisors is an integer number (4963889296710).

Almost surely, 2^{491911115053160} is an apocalyptic number.

491911115053160 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491911115053160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635377829978880).

491911115053160 is an abundant number, since it is smaller than the sum of its proper divisors (778844544904600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491911115053160 is a wasteful number, since it uses less digits than its factorization.

491911115053160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459948 (or 459944 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 47.

The spelling of 491911115053160 in words is "four hundred ninety-one trillion, nine hundred eleven billion, one hundred fifteen million, fifty-three thousand, one hundred sixty".